Multiple tamping machine



Oct. 13, 1959 R. c. MELANSON 2,908,206

' MULTIPLE TAMPING MACHINE 2 Sheets-Sheet 1 Filed sew-27. 195s w I a;

mmvu- W I V I 35 I H I?TVEN @Awff/le/mm ATTORNEYS /INVENTOR.

2 Sheets-Sheet 2 ilk R. C. MELANSON MULTIPLE TAMPING MACHINE F-ilegi Sept 2'7, 1956 This invention relates to machines and equipment used.

in construction; and in particular 'a machine having multipletarnping'b'arsactuated by camshafts extended through Horizontally disposed slotsfin ends of 'the bars and op.- eratively connected to the bars withsliding blocks or bearings;.with' a roller positioned'aheadiof' the bars, another roller positioned to follow the bars, andwith power means. for actuating the camshafts for vertically reciprocating the tampingfbars.

The purpose of this inventionis to. provide a. machine. having avplurality of vertically reciprocating ,tamp ing bars. in "which the barsare'particularly adaptedtf'or compacting:

and leveling hot or cold. bituminous concrete,. and. for reducingthe concrete to the. required density atcompac.- tion.

Various types of tamping machines have been provided,

and although such machines are satisfactory: for many purposes they. are notnsuitable for relatively largeslabs ofLbituminous .concrete, and :other comparatively soft: ma-

terials forv whichhigh speed tamping-v is required. With: this thought in mind. this inventioncontemplates a pluralityi of elongated transversely disposed bars with-tends of! the; bars'vmounted-on oflf-setsections of oamshafts- Whereby with the camshafts rotating at comparatively high speeds; such' as nine hundred: rtppm; a-beating ac.-

tion isobtained and a slab-with a smooth upper: surface is :obtained.

.The objectof this invention-is; therefore, to providea" tamping machinehaving; a-p'lurality of: verticallyslidable 1 bars reciprocatingv at highspeed and mounted to-:travel over abodyof: comparatively-loose material: such as bituminous concrete :Whereincreased densitiesand; high dee grees iof compaction: are I required.-

Another object of therinvention is toiprovidetaatamp ingmachine in--wh1'ch' the: machine is readily maneuverable: t

A further. objec'uofithe inventionis ftotprovidetavrelative lyzzhigh'aspeed tamping machine imwhich' theumaehine isof :al-sirnple and .CCOIIOIHlCEILGOHStIZHCtlQHL 'Withztheseandzotherzobjectszand advantages in viewthe inventionembodiesaa' framework having: tparallel cam shafts :vpositioned: imropposite; sides thereof, transversely disposed tampingi 'barst having slots extending" inwardly from: the: ends :positioned whereby thecamshafts-extend through-the slots', .a motor positioned above the barstfor di iving ih'e camshafts; ground engaging-rollers adjustablymounted on:-tl1e frame for regulating the elevation of lower: surfaces I of the -tampingbars anda handle with --a tank thereon-extended fr'om theframe and positioned' whereby fluid from the tank is drainediby gravity-to-the surf'acesof the rollers.

Otherfeatures and 'advantagesof the invention 'will' appear-from the following description taken inconnectionwith thedrawings, wherein:

Figure 1 is a side elevationalviewofthe improved tamping-machine.

FiguIe-Zis a front elevationalview of the machine;

hired States Patent ice Figure 3; is a longitudinal section through th'etmachine taken on line 3-3 of Figure 2 illustrating thevrelative positions of. the .tamping bars.

Eigure tis across section. through-the machine taken OIlz-lll164+-4 of Figure- 1. illustrating,the design oftthe ta mping bars.

Figure 5 is aiperspective view of: the machine ,withzthe parts assembled showing the device in: an operativev .posi

' tion.

Referringinowto" the drawing wherein like reference charactersdenote corresponding'partszthezimproved 'tarnp; 'ing machine of this invention ineludesiparall'el tamping bars-.10.-slidablymounted=between channel bars LL and "12 with camshaftslS and 14-extended;through-horizontally disposed slots: 15 and? '161in-ends-tof the::h-ars.. Theends of ;the% camshafts-are -rotatably mounted- =in :bearings formed with upper sections 17 and lower sections-ISmandt the seotiensdfl! and 18 are provided 'with vishaped upper and lowerredges whereby the bearirigsare:retainedrin position laterallyi and arevfreetto slide;=longitudinal1y\-of the bars byqcam elements 19 .aiHdi2&lfilth&1SlQtSh The: camtele ments are; positioned= 10" slide: the :sections" of) the: blocks which provide bearings laterally and, at the sarnettiine; reciprocate .nthe tampingibars: vertically:v

Each cam: elementzof-"theicamshafts: ishdesori'bedifromva different? centerrwhereby the tampi-ngzbars-reciprocate1in+ div-idually: and: with: the: camshaftsa rotating at relatively high speed=a beating; action:ismtbta'ined" whereby the concrete; is whipped into-a plastic. state.

Theacamshaft's are actuatedi by a motor 211 secured -to the upper plate 22=aof -'a stand 231113 bolts 24' a-nd a belt 25 trained over: a-wpulley 26 on the motor shaft 'l'lprovides means for"- rotating the camshafts by the motort The; motor may also. he cone cted to conventionalfdri-ving means-for propelling-the tamping machine -if-"desired.

Witha the *motor turning at relatively high speedssuch as 3609 rpm; the camshafts rotate at lower' speeds; such: as -4' to 1 5 by reduction'resultiugfromthe diameter of thesma-l-l pulley-1 26;- ascompared to 'the' diameter 'of the' pulleys 28 and 29Z The speed ratio is only'suggestive as itwill'be und'en stood that pulleys may be provided of" different sizes-- in ordertoobtain any speed desired.

The upper sections- 17 of the" split bearings" are provided with an inverted V-shaped upper edge 30 thatis' positioned to slide in a correspondingly shaped groove 31 of the .tamping. bars. or. plates tllland thelowen sections 518 of the .blocks are provided with V-shaped-edges- 32 that1 travel in similarly shaped slots or grooves-33in thettampingbars. Bythis: means thebearing bloeks aresecured in position laterally and remain in theslots. 15 andvlfi of the bars-continuously.

The extended ends of the camshafts onwhich, {the pulleys? 28. 1 and; 29 are 1 positioned 1' are also; provided :with sprockets. 34- and 35 over w-hiehi is avroller chain 36vi's trained and theupperstrand ofuthe:chainvisapositioned to engage an adjustable idler sprocket 37'gmounted-tomthe member. 23 of: the: supportingastrueture; WlIQEBbYvI slack in thetchainnnayt .be taken up:

The camshaft- 14 -13 rotatably'tmonnted by bearings-i 382 and 39 on the channel bars 11 and ltZnandth'e shaftcliis mounted by similar bearings 40 also: positioned upomthe upper -flanges-:41 Qfl the channelabars; i

Theqplatforrn 'oriplate; ZZLuponvWhichz theimoton is mounted is -.supported by at plate 23 at-tthe outerend and also'byaplate 42" at the -opposite end and th'e-hase43 0f the motor is securedto the plate or platfOmn ZZ bolts 44.

Rollers 45 and 46' extendedby arms 47jand 48ffr'omthe leading end of the machine are rotatably mountedon a 1 the member 50 providing means for raising and lower- 1g the rollers 45 and 46. v p

The bars 50 are secured, such as by welding, to ends f the channel bars 11 and 12, and the bars 50 are iounted with the ends extended beyond the webs of the hannel bars, as shown in Figures 1 and 5.

The rollers 55, at the rear for following the tamping ars are mounted in brackets 56 on lower surfaces of the andle 57 with caster-like yokes 58 whereby the device readily maneuverable by a handle bar 59 at the upper nd of the handle 57. The rollers are mounted in the okes 58 which shafts 60.

The lower end of the handle 57 is secured to the beam 2 with a bearing bracket 61 and the lower end of the .andle rests upon a transversely disposed plate or shoe 2 secured to a flange 63 on the lower end of the beam r channel bar 12. 1

A similar shoe 64 is secured to the lower flange '65 of he cross beam or channel bar 11 and the elevation of the hoes 62 and 64 is readily adjusted by adjusting the ositions of the rollers 45 and 46. The arms of the oke 58 are connected with a cross bar 66 as shown 1 Figures 3 and 5.

A tank 67 having a filling opening 68 is positioned on he handle 57 and, as shown in Figure l, a tube 69 ex- :nded from the lower end of the tank, and provided with valve 70, extends forwardly to the rollers 45 and 46 nd the forward end is provided with a perforated sec- .on 71 that provides a water spray over the rollers 45 nd 46 to prevent material adhering to the surfaces of 1e rollers. The tank 67 is secured to flanges 72 extended tom the handle 57 and also to the trailing edge of the latform 22 upon which the motor 21 is mounted.

The tamping bars are rectangularly shaped in eleation and the horizontally disposed slots and 16 xtend inwardly a distance at least equal to the lengths of 1e bearings plus twice the eccentricity of the cam surthe length of the bearings plus twice the eccentricity of the cam elements of the'camshafts, said camshafts having cam elements corresponding in thickness with that of the bearings and bars, means for rotating the camshafts, and rollers upon which the frame is mounted.

2. A tamping machine comprising a horizontally disposed frame, transversely positioned tamping plates with slots extending inwardly at the ends and mounted to slide vertically in the frame, carnshafts rotatably mounted in the frame, extended through the slots in theends of the tamping plates, and having cam elements corresponding in thickness with that of the tamping plates, bearings mounted on the cam elements of the camshafts and positioned in the slots in the ends of the tamping plates, the

length of the slots being at least equal to the lengths of 3. A tamping machine comprising a horizontally disposed frame, transversely positioned tamping plates with 7 slots extending inwardly at the ends mounted. to slide vertically in the frame, camshafts rotatably mounted in the frameextended through the slots in the ends of the ices, from end surfaces whereby the slots are positioned Operation With the parts assembled as illustrated and described tamping plates, and having cam elements corresponding least equal to the lengths of the bearings plus twice the' eccentricity of the cams, means carried by the frame for rotating the camshafts, rollers mounted on the frame for supporting the frame and tamping bars, and means for adjusting the positions of the rollers for controlling the elevation of the tamping bars.

4. A tamping machine comprising a horizontally disposed frame, transversely positionedtamping plates with slots extending inwardly at the ends mounted to slide vertically in the frame, camshafts rotatably mounted in the frame extended through the slots in the ends of the tamping plates and having cam elements corresponding in thickness with that of the tamping plates, bearings mounted on cam elements of the camshafts and positioned in the slots in the ends of the tamping plates, the slots in the ends of the tamping plates being horizontally positioned and the lengths of the slots being at least equal to the lengths of the bearings plus twice the eccentricity of the cam elements of the camshafts, means carried by the 1e tamping device is positioned on bituminous concrete r the like and with the motor started the tamping bars 7e reciprocated by the camshafts whereby a high speed eating action is obtained thoroughly tamping the conetc or other mixture and increasing the density or comactness thereof.

The machine may be provided with any suitable amount E tamping bars and the parts may be operated by an ectrical motor as shown, or by a gasoline engine or :her power means. I

It will be understood that modifications, within the scope f the appended claims may be made in the design and 'rangement of the parts without departing from the Iirit of the invention.

What is claimed is:

1. A tamping machine comprising a horizontally dissed frame, horizontally positioned transversely disposed mping bars having horizontally disposed slots extended wardly from the ends, mounted in the frame, camshafts :tended through the slots in the ends of the horizontally sposed bars, bearings positioned in the slots of the IIS and in which cam elements of the camshafts are ounted, the lengths of the slots being at least equal to frame for rotating the camshafts, rollers mounted on the forward and rearward ends of the frame for supporting the frame and tamping bars and means for supplying water to said rollers at the forward end of the frame.

5. A tamping machine comprising a horizontally disposed frame, vertically disposed transversely positioned tamping plates with horizontally positioned slots extending inwardly at the ends mounted to slide vertically inf the frame, camshafts rotatably mounted in the frame extending through the slots of the tamping plates, and haying cam elements corresponding in thicknesswith thatlof 6. In a tamping machine the combination. which comprises a frame including transversely disposed channel bars positioned in spaced relation, tamping bars slidably mounted between the channel bars, the ends of the tamp- 1ng barshaving horizontally disposed slots extended in- -wardly and also having extensions extended outwardly frorn the lower edges thereof, camshafts having cam elements corresponding in thickness with that of the tamping bars, extended through the slots in the ends of the tamping bars, rotatably mounted on the channel bars, bearing blocks mounted to slide longitudinally in the slots in the ends of the tamping bars and in which cam elements of the camshafts are positioned, the lengths of the slots in the ends of the tamping bars being equal to the lengths of the bearing blocks plus twice the eccentricity of the cam elements of the camshafts, supporting rollers mounted on the frame, means for adjusting the position of the rollers for adjusting the elevation of the frame, power means mounted on the frame and operatively connected to the camshafts for rotating the camshafts and means also mounted on the frame for supplying water to rollers extended from the leading end of the frame.

7. In a tamping machine the combination which comprises a frame including transversely disposed channel bars positioned in spaced relation, tamping bars slidably mounted between the channel bars, the ends of the tamping bars having horizontally disposed slots extended inwardly therein, camshafts having cam elements corresponding in thickness with that of the tamping bars, rotatably mounted on the channel bars, bearing blocks mounted to slide longitudinally in the slots in the ends of the tamping bars and in which cam elements of the chamshafts are positioned, the lengths of the slots in the ends of the tamping bars being equal to the lengths of the bearing blocks plus twice the eccentricity of said cam elements of the camshafts, supporting rollers mounted on the name, means for adjusting the position of the rollers for adjusting the elevation of the frame, powe'1 means mounted on the frame and operatively connected tc the camshafts, for rotating the camshafts, a handle extended upwardly from the frame, a Water tank positioned on the handle, a perforated tube extended above rollers extended from the forward end of the frame and means for connecting the water tank to the perforated tubes.

8. A tamping machine comprising a horizontally disposed frame, spaced transversely disposed ventically positioned channel bars mounted in said frame, transversely positioned tamping plates having slots extended inwardly in ends thereof between the channel bars and positioned with side surfaces thereof in meeting and also in sliding relation, outer surfaces of the outermost tamping plates also being in meeting and sliding relation with inner surfaces of the channel bars, camshafts rotatably mounted on the frame and positioned with cam elements thereof extended through the slots of the tamping plates, means for rotating the camshafts, means for supporting the frame in spaced relation to a surface upon which the machine is positioned, and means for adjusting the elevation of the tamping plate assembly.

References Cited in the file of this patent UNITED STATES PATENTS 1,390,479 Baker Sept. 13, 1921 1,988,660 Lyliken Jan. 22, 1935 2,078,900 Biles Apr. 27, 1937 2,116,816 Winkler May 10, 1938 2,366,237 Clausen Jan. 2, 1945 

